空间地模仿的一个新模型相关地震地面运动被开发。在模型,描绘也就是,不连贯效果,波浪经过效果和地点反应完成的空间可变性的三不同效果的主要因素,被考虑,并且相应术语 / 参数被合并到一致地面运动的众所周知的模型。一些这些术语 / 参数能被根操作决定,并且其它能直接是计算的。建议模型首先理论上被验证,并且地面运动模拟的例子作为一幅进一步的插图被提供。整体期望价值和整体 auto-/cross-spectral 密度模仿的地面运动工作,这被证明与目标相同光谱密度功能。建议模型能也被用来模仿另外的相关随机的过程,例如波浪和风负担。
A new model to simulate spatially correlated earthquake ground motions is developed. In the model, the main factors that characterize three distinct effects of spatial variability, namely, the incoherency effect, the wave-passage effect and the site-response effect, are taken into account, and corresponding terms/parameters are incorporated into the well known model of uniform ground motions. Some of these terms/parameters can be determined by the root operation, and others can be calculated directly. The proposed model is first verified theoretically, and examples of ground motion simulations are provided as a further illustration. It is proven that the ensemble expected value and the ensemble auto-/cross-spectral density functions of the simulated ground motions are identical to the target spectral density functions. The proposed model can also be used to simulate other correlated stochastic processes, such as wave and wind loads.